OFFSET
1,7
COMMENTS
Conjecture: the only solutions for x!+y!=n^2 are x=0,0,0,1,1,1,2,4,4,4 and y=4,5,7,4,5,7,2,0,1,5 respectively.
CROSSREFS
KEYWORD
nonn
AUTHOR
Farideh Firoozbakht, Jul 07 2009
STATUS
approved